Instructions

Preparation

Sit on seat. Grasp rotating handles with overhand grip on
each side and place forearms on pads.

Execution

Rotate shafts by turning palm upward. Return and repeat.

Comments

Depending on participant's range of motion and machine's
design, handles may need to be prerotated so resistance is present
throughout movement, particularly initial phase of rotation.
See forearm
supination up close.